San Diego Gas & Electric said two wildfires in San Diego County today are threatening its major transmission lines and issued a plea to its consumers to conserve electricity.

“If something does happen, we’re going to have to cut power and start rolling blackouts,” said Christy Heiser, a company spokeswoman.

SDG&E, which serves Southern Orange County, including San Clemente, San Juan Capistrano and Mission Viejo, urged customers to reduce use of home appliances, especially air conditioners – suggesting setting the thermostat at 82 degrees.

The wildfires include one in Camp Pendleton, burning near transmission lines running out of San Onofre Nuclear Generating Station. Camp Pendleton issued a statement shortly before noon that the 210-acre fire was 80 percent contained.

The other blaze, called the Horse fire, threatened power lines running through eastern San Diego County, Heiser said. The U.S. Forest Service reported the fire burned 16,455 acres in the Cleveland National Forest and was 15 percent contained as of 8:47 a.m.